Not able to write an xlsm file - phpoffice phpspreadsheet version 1.25.2

[SakshiGrover]

This is:

- [ ] a bug report
- [ ] a feature request
- [ ] **not** a usage question (ask them on https://stackoverflow.com/questions/tagged/phpspreadsheet or https://gitter.im/PHPOffice/PhpSpreadsheet)

What is the expected behavior?

What is the current behavior?

What are the steps to reproduce?

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

<?php

require __DIR__ . '/vendor/autoload.php';

// Create new Spreadsheet object
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();

// add code that show the issue here...
$writer = new Xlsx($spreadsheet);
$writer->save("*.xlsm");
If this is an issue with reading a specific spreadsheet file, then it may be appropriate to provide a sample file that demonstrates the problem; but please keep it as small as possible, and sanitize any confidential information before uploading.

### What features do you think are causing the issue

- [ ] Reader
- [ ] Writer

### Does an issue affect all spreadsheet file formats? If not, which formats are affected?


### Which versions of PhpSpreadsheet and PHP are affected?

[oleibman]

It is not clear to me what you want. You can, for example, load an xlsm spreadsheet and save it as a different xlsm, and that will work correctly. There is also limited support for form controls, again involving loading and saving. We do not, however, support creating macros or form controls. Is that what you are looking for?